Games Trying to put a "fire button" in my stage with LibGDX

[Ja8]

Hi everybody:
First of all, this is my first message in the forum. I have read the rules, but I'm sorry if I had some errors writing this.
I'm trying to make a very simple game in LibGDX with a main screen, a stage, an actor, a camera that follows the actor and a couple of buttons (to shot and to jump) in the bottom of the screen.
The problem is I haven't find too many examples with gameplay buttons and I don't understand well how they work in the examples I saw.
I 'll appreciate if you could put me in the right way about how to put the buttons and manage their inputs.

Thank you very much!!

 

[ilan]

Hi @Ja8 and welcome to b4x.com!

I'm trying to make a very simple game in LibGDX with a main screen, a stage, an actor, a camera that follows the actor and a couple of buttons (to shot and to jump) in the bottom of the screen.

this does not sound like a very simple game.
libgdx is very complex and has many many features.

i would recommend your first to go through the awesome examples of @Informatix (https://www.b4x.com/android/forum/threads/libgdx-game-engine.32594/#content)
have a look at the Scene2D_Buttons example to see how to add buttons to a lgScn2DStage and handle clicks.

basically you can do it in 2 ways.

1, work with libgdx Actors and work with them similar to simple views like button, etc..
2, you draw everything with lgSpriteBatch including buttons etc.. and handle the touches/clicks with lgInputProcessor so if a touch on x/y happens where the button texture is drawn then perform a click.

what you should avoid is mixing b4a views in your libgdx game. use only libgdx components and choose one of the two ways listed here.

So have a look at @Informatix examples and also check this great simple example from @andymc: https://www.b4x.com/android/forum/threads/cloney-bird-libgdx-version.38793/#content

 

[Ja8]

Finally, I've written 2 options to draw the buttons and receive the touchs and keys inputs:

public class SuperController2 extends InputAdapter{
    public boolean shooting=false;
    private Rectangle recFire;
    private Sprite sprFire;
    private Stage escena;
    private Batch batch;
    private Vector3 pos;
    public SuperController2(Stage escena){
        this.escena=escena;
        this.batch=escena.getBatch();
        sprFire=new Sprite(new Texture("button.png"));
        recFire=new Rectangle(0,0,sprFire.getWidth(),sprFire.getHeight());               
    }
    public void actualizar() {
        batch.begin();
        sprFire.setBounds(escena.getCamera().position.x-(Gdx.graphics.getWidth()/2)+50, escena.getCamera().position.y-(Gdx.graphics.getHeight()/2)+50, 50, 50);
        sprFire.draw(batch);
        batch.end();
        if(Gdx.input.isTouched()){
            pos=new Vector3(Gdx.input.getX(),Gdx.input.getY(),0);
            recFire.setPosition(sprFire.getX(),sprFire.getY());
            Camera cam=escena.getCamera();
            cam.unproject(pos);
            if(recFire.contains(pos.x,pos.y)) {
                shooting=true;
            }
        }
        if(Gdx.input.isKeyPressed(Input.Keys.SPACE)) {
            shooting=true;
        }
    }
}

Or the orther one:

public class SuperController1  extends Actor implements InputProcessor{
    Texture texFire;
    Stage escena;
    public boolean shooting=false;
    private Rectangle recFire;
    
    public SuperController1(Stage escena){
        this.escena=escena;
        texFire=new Texture("button.png");
        recFire=new Rectangle(50,380,50,50);       
    }
    @Override
    public void draw(Batch batch,float alpha) {
        this.setSize(100, 50);
        batch.draw(texFire,this.getX()+50,this.getY()+50,50,50);
    }
    @Override
    public void act(float delta) {
        super.act(delta);
    }
    @Override
    public boolean keyDown(int keycode) {
        switch(keycode) {
        case Input.Keys.SPACE:
            shooting=true;
            return true;
        default:
            return false;
        }
    }
    @Override
    public boolean keyUp(int keycode) {
        switch(keycode) {
        case Input.Keys.SPACE:
            shooting=false;
            return true;
        default:
            return false;
        }
    }
        @Override
    public boolean touchDown(int screenX, int screenY, int pointer, int button) {
        Vector3 pos=new Vector3(this.getX(),this.getY(),0);
        Camera cam=escena.getCamera();
        cam.unproject(pos);
        if(recFire.contains(screenX, screenY)) {
            izquierda=true;
            return true;
        }else {
            return false;
        }
    }
    @Override
    public boolean touchUp(int screenX, int screenY, int pointer, int button) {
        if(recFire.contains(screenX, screenY)) {
            shooting=false;
            return true;
        }else{
            return false;
        }
    }
    @Override
    public boolean keyTyped(char character) {    return false;    }
    @Override
    public boolean touchDragged(int screenX, int screenY, int pointer) {    return false;    }

    @Override
    public boolean mouseMoved(int screenX, int screenY) {    return false;    }

    @Override
    public boolean scrolled(float amountX, float amountY) {    return false;    }
}

Which one do you think is better?
(I haven´t solved the resize window problem yet)

Thanks!

 

[ilan]

this is b4x forum not Java